guardian strategy

2003 Mercruiser 4.3MPI ALPHA one Gen 2 When the engine reaches 4000rpm constant alarm goes off and engine throttles back. Alarm silences when placed back in neutral. Attached are pictures of errors. Temps are good Oil pressure / level is good Drive fluid is good And I replaced the water...

2003 Sea Ray 280 / Twin Mercruiser 4.3 / Alpha One Gen 2 Had boat out ran fine. Docked at a marina for the day. On way back home when sb engine reached at or over 3500rpm it went into Guardian Mode, i believe. It throttled itself back to around 6% with constant alarm until i took it to neutral...